Sound production device and electronic equipment

Abstract

The invention belongs to the technical field of electro-acoustic conversion, and particularly relates to a sound production device and electronic equipment, the sound production device comprises a vibration system, the vibration system comprises a vibrating diaphragm assembly and a plurality of voice coils, and the plurality of voice coils are respectively provided with a first end and a second end which are oppositely arranged along the axial direction; wherein the number of winding layers of the voice coil wire at the first end of each voice coil is greater than the number of winding layers of the voice coil wire at the second end of each voice coil, the plurality of voice coils comprise first voice coils and second voice coils which are the same in number, the first ends of the first voice coils are connected with the vibrating diaphragm assembly, and the second ends of the second voice coils are connected with the vibrating diaphragm assembly. The second end of the second voice coil is connected with the diaphragm assembly. The voice coil provided by the invention can improve the flatness of the BL curve of the sound production device, thereby improving the total harmonic distortion.

Description

Technical Field

[0001] The invention belongs to the technical field of electroacoustic conversion, and particularly relates to a sound-generating device and an electronic device. Background Art

[0002] Sounding units are widely used in portable electronic devices such as mobile phones and laptops. With the development of technology, electronic products have higher and higher requirements for the acoustic performance and ultra-thinness of sounding units.

[0003] The sound unit usually includes a basin frame and a vibration system and a magnetic circuit system installed on the basin frame. The magnetic circuit system forms a magnetic gap correspondingly. The vibration system includes a diaphragm and a voice coil assembly connected to the diaphragm and extending into the magnetic gap. The voice coil assembly is energized and drives the diaphragm to vibrate and produce sound under the action of the magnetic field of the magnetic gap. When the input voltage increases, the vibration amplitude of the voice coil increases accordingly. The voice coil leaves the uniform area of ​​the magnetic gap magnetic field due to vibration, so that the product BL value of the sound unit cannot remain constant, and the linear relationship of the electrodynamic effect F=IBL is destroyed, resulting in nonlinear distortion. And with the improvement of the performance requirements and ultra-thin requirements of the sound unit, that is, with the thinning of the sound unit thickness and the increase of the amplitude of the vibration system, the harmonic distortion also increases, which in turn affects the overall performance of the sound unit.

[0004] Therefore, in view of the above shortcomings, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a sound generating device and an electronic device to solve the problems in the prior art.

[0006] A first aspect of the present invention provides a sound-generating device, comprising a vibration system, wherein the vibration system comprises a diaphragm assembly and a plurality of voice coils, wherein the plurality of voice coils respectively have a first end and a second end arranged opposite to each other along an axial direction thereof; wherein the number of winding layers of the voice coil wire at the first end of each of the voice coils is greater than the number of winding layers of the voice coil wire at the second end, the plurality of voice coils comprise the same number of first voice coils and second voice coils, the first end of the first voice coil is connected to the diaphragm assembly, and the second end of the second voice coil is connected to the diaphragm assembly.

[0007] The sound-generating device provided by the present invention may also have the following additional technical features:

[0008] In a specific implementation manner of the present invention, a plurality of the voice coils are arranged side by side; or, a plurality of the voice coils are coaxially nested.

[0009] In a specific embodiment of the present invention, the first voice coil and the second voice coil are arranged alternately and side by side horizontally.

[0010] In a specific embodiment of the present invention, each of the voice coils includes at least two winding areas with different numbers of voice coil wire winding layers, and a step portion is formed between two adjacent winding areas.

[0011] In a specific implementation manner of the present invention, the first voice coil and the second voice coil have consistent outer dimensions.

[0012] In a specific embodiment of the present invention, the diaphragm assembly includes a diaphragm and a vibration plate arranged on the diaphragm, the diaphragm is arranged on the outer periphery of the vibration plate, a portion of the vibration plate is recessed toward the direction close to the voice coil to form a bracket portion corresponding to the plurality of voice coils, and each of the voice coils is connected to the corresponding bracket portion.

[0013] In a specific embodiment of the present invention, the diaphragm includes a folding ring portion, an internal fixing portion arranged on the inner side of the folding ring portion, and an external fixing portion arranged on the outer side of the folding ring portion, the internal fixing portion is connected to the vibration plate, and the recessed direction of the folding ring portion is the same as the recessed direction of the bracket portion.

[0014] In a specific embodiment of the present invention, the sound-generating device further comprises a magnetic circuit system, wherein the magnetic circuit system is provided with magnetic gaps arranged in one-to-one correspondence with the plurality of voice coils, wherein the second end of the first voice coil and the first end of the second voice coil are inserted into the corresponding magnetic gaps, and along the arrangement direction of the plurality of voice coils, the winding length of the first voice coil located in the magnetic gap is the same as the winding length of the second voice coil located in the magnetic gap.

[0015] In a specific embodiment of the present invention, the magnetic circuit system includes a magnetic yoke and a plurality of magnet groups arranged on one side of the magnetic yoke close to the diaphragm assembly, each of the magnet groups includes a first magnetic portion and a second magnetic portion arranged on both sides of the first magnetic portion, the first magnetic portion and the second magnetic portion are spaced apart to form the magnetic gap, and two adjacent magnet groups share one second magnetic portion.

[0016] A second aspect of the present invention further provides an electronic device, comprising any one of the above-mentioned sound-generating devices.

[0017] The sound-generating device provided by the embodiment of the present invention has a vibration system including a diaphragm assembly and multiple voice coils, and the number of winding layers of the voice coil wire at the first end of each voice coil is greater than the number of winding layers of the voice coil wire at the second end, and the first end of the first voice coil in the voice coil is connected to the diaphragm assembly, and the second end of the second voice coil is connected to the diaphragm assembly. In this way, when the voice coil vibrates upward and downward, the length of the voice coil wire in the magnetic field is more uniform, thereby making the BL curve flatter and the linearity better, thereby reducing the total harmonic distortion and improving the sound effect of the sound-generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is an exploded view of a sound-generating device in an embodiment of the present invention;

[0020] Figure 2 is a cross-sectional view of a sound-generating device in an embodiment of the present invention;

[0021] Figure 3 is a cross-sectional view of a vibration system in one embodiment of the present invention;

[0022] Figure 4 is a cross-sectional view of a vibration system in another embodiment of the present invention;

[0023] Figure 5-Figure 6 Schematic diagram of the arrangement and winding of the voice coil in an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 100- sound generating device;

[0026] 10- housing;

[0027] 20-vibration system, 21-diaphragm assembly, 23-diaphragm, 231-external fixing part, 232-folding ring part, 233-inner fixing part, 24-vibration plate, 241-bracket part, 25-voice coil, 251-first voice coil, 252-second voice coil;

[0028] 30-magnetic circuit system, 31-magnetic yoke, 32-first magnetic part, 321-first magnet, 322-first magnetic plate, 33-second magnetic part, 331-second magnet, 332-second magnetic plate;

[0029] 40-Centering support. DETAILED DESCRIPTION

[0030] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0031] It should be understood that the terms used in the text are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used in the text may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described in the text are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0032] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0033] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0034] Reference Figure 1-6In a first aspect, the present invention provides a sound-generating device 100, including a vibration system 20, wherein the vibration system 20 includes a diaphragm assembly 21 and a plurality of voice coils 25, wherein the plurality of voice coils 25 respectively have a first end and a second end arranged opposite to each other along an axial direction thereof; wherein the number of winding layers of the voice coil wire at the first end of each voice coil 25 is greater than the number of winding layers of the voice coil wire at the second end thereof, and the plurality of voice coils 25 include a first voice coil 251 and a second voice coil 252 of the same number, wherein the first end of the first voice coil 251 is connected to the diaphragm assembly 21, and the second end of the second voice coil 252 is connected to the diaphragm assembly 21.

[0035] The sound-generating device 100 specifically includes a shell 10, a vibration system 20 and a magnetic circuit system 30, wherein the shell 10 is formed as a hollow frame, the vibration system 20 and the magnetic circuit system 30 are respectively connected to opposite sides of the shell 10 to be accommodated in the shell 10, and the magnetic circuit system 30 forms a magnetic gap with a magnetic field, and the voice coil 25 of the vibration system 20 is inserted into the magnetic gap. When the voice coil 25 is energized, it can drive the vibration system 20 to vibrate and produce sound under the drive of the magnetic field.

[0036] The vibration system 20 includes a diaphragm assembly 21 and a plurality of voice coils 25. The diaphragm assembly 21 is connected to the housing 10. One end of the voice coil 25 is connected to the diaphragm assembly 21, and the other end is correspondingly inserted into the magnetic gap. In this way, the relative force between the vibration system 20 and the magnetic circuit system 30 can be increased, thereby improving the sound performance of the sound-generating device 100.

[0037] The voice coil 25 includes the same number of first voice coils 251 and second voice coils 252. Along the axial direction, the number of winding layers of the first end of each voice coil 25 is greater than the number of winding layers of the voice coil wire at the second end, and the first end of the first voice coil 251 is connected to the diaphragm assembly 21, and the second end of the second voice coil 252 is connected to the diaphragm assembly 21. In this way, when the voice coil 25 vibrates upward and downward, the length of the voice coil wire in the magnetic field is more uniform, thereby increasing the flatness of BLx (BL: the dynamic or force coefficient of the monomer, in Tesla meter (TM)), thereby reducing the total harmonic distortion.

[0038] The sound-generating device 100 provided in the embodiment of the present invention has a vibration system 20 including a diaphragm assembly 21 and a plurality of voice coils 25, and the number of winding layers of the voice coil wire at the first end of each voice coil 25 is greater than the number of winding layers of the voice coil wire at the second end, and the first end of the first voice coil 251 in the voice coil 25 is connected to the diaphragm assembly 21, and the second end of the second voice coil 252 is connected to the diaphragm assembly 21. In this way, when the voice coil 25 vibrates upward and downward, the length of the voice coil wire in the magnetic field is more uniform, thereby making the BL curve flatter and more linear, thereby reducing the total harmonic distortion and improving the sound effect of the sound-generating device.

[0039] In one embodiment, a plurality of voice coils 25 are arranged side by side or a plurality of voice coils 25 are coaxially nested.

[0040] Specifically, the sound generating device 100 is formed into a rectangular parallelepiped structure, wherein the length direction thereof is the long axis, the width direction thereof is the short axis, and the thickness direction thereof is the vibration direction of the vibration system 20 .

[0041] When multiple voice coils 25 are arranged side by side, the lengths of the multiple voice coils 25 are substantially equal and slightly smaller than the length of the long axis of the sound-generating device 100, and the multiple voice coils 25 are arranged at intervals along the width direction of the sound-generating device 100. When the number of the first voice coil 251 and the second voice coil 252 is more than one, the first voice coil 251 and the second voice coil 252 are alternately arranged along the short axis direction, or the first voice coil 251 and the second voice coil 252 are arranged symmetrically about the line connecting the midpoints of the two short axes.

[0042] When multiple voice coils 25 are coaxially nested, the lengths and widths of the multiple voice coils 25 are incrementally arranged, so that coaxial nesting can be achieved. When the number of the first voice coil 251 and the second voice coil 252 is more than one, the first voice coil 251 and the second voice coil 252 are alternately arranged along the short axis direction, or multiple first voice coils 251 are arranged between multiple second voice coils 252.

[0043] Preferably, in this embodiment, a plurality of voice coils 25 are arranged side by side.

[0044] In one embodiment, the first voice coil 251 and the second voice coil 252 are arranged alternately and side by side horizontally, so as to improve the balance of the driving force of the voice coil 25, thereby reducing the impact on the diaphragm assembly 21, ensuring the force balance of the diaphragm assembly 21, and thus reducing harmonic distortion.

[0045] In one embodiment, each voice coil 25 includes at least two winding regions with different numbers of voice coil wire winding layers, and a step portion is formed between two adjacent winding regions.

[0046] Specifically, at least two winding areas are arranged in sequence in the axial direction of the voice coil 25, wherein the number of winding layers of the winding areas can decrease in sequence. Of course, it can be understood that the number of winding layers of the multiple winding areas is not limited to the above arrangement and can be selected and set according to actual use requirements.

[0047] In a specific embodiment of the present invention, in two adjacent winding regions of the voice coil 25, the number of winding layers in the winding region at the second end is 1-7 layers less than the number of winding layers in the winding region at the second end. For example, the number of winding layers in the winding region at the second end is 3-4 layers less than the number of winding layers in the winding region at the first end.

[0048] exist Figure 5In the specific embodiment shown, two voice coils 25 are arranged side by side, and each voice coil 25 has two winding areas. The number of winding layers in the winding area at the first end of one voice coil 25 is 4, and the number of winding layers in the winding area at the second end is 2. The number of winding layers in the winding area at the first end of the other voice coil 255 is 2, and the number of winding layers in the winding area at the second end is 4. Figure 6 In the specific embodiment shown, two voice coils 25 are arranged side by side, and each voice coil 25 has two winding areas. The number of winding layers in the winding area located at the first end of one voice coil 25 is 4, and the number of winding layers in the winding area located at the second end is 3, and the number of winding layers in the winding area located at the first end of the other voice coil 255 is 3, and the number of winding layers in the winding area located at the second end is 4.

[0049] In one embodiment, the outer dimensions of the first voice coil 251 and the second voice coil 252 are consistent. In this way, the driving forces formed on the first voice coil 251 and the second voice coil 252 are substantially consistent, which helps to keep the force on the diaphragm assembly 21 balanced and reduce total harmonic distortion.

[0050] In one embodiment, the diaphragm assembly 21 includes a diaphragm 23 and a vibration plate 24 disposed on the diaphragm 23. The diaphragm 23 is disposed on the outer periphery of the vibration plate 24. A portion of the vibration plate 24 is recessed toward the direction close to the voice coil 25 to form a bracket portion 241 corresponding to the multiple voice coils 25 one by one, and each voice coil 25 is connected to the corresponding bracket portion 241.

[0051] Specifically, in the diaphragm assembly 21, the periphery of the diaphragm 23 is connected to the housing, so that the vibration plate 24 and the voice coil 25 connected to the side of the vibration plate 24 are connected to the housing 10. By forming a bracket portion 241 recessed toward one side of the voice coil 25 on the vibration plate 24 and connecting the voice coil 25 to the bracket portion 241, the position of the voice coil 25 in the magnetic gap can be further adjusted, so that the voice coil 25 is located in an area with dense magnetic flux lines, thereby improving the driving force between the magnetic circuit system 30 and the voice coil 25, and improving the performance of the sound-generating device 100.

[0052] In one embodiment, the diaphragm 23 includes a folded ring portion 232, an inner fixing portion 233 disposed on the inner side of the folded ring portion 232, and an outer fixing portion disposed on the outer side of the folded ring portion 232, the inner fixing portion 233 is connected to the vibration plate 24, and the recessed direction of the folded ring portion 232 is the same as the recessed direction of the bracket portion 241.

[0053] Specifically, the inner fixing portion 233, the folding ring portion 232 and the outer fixing portion 231 are all annular, wherein the outer fixing portion 231 is arranged around the periphery of the folding ring portion 232 and is connected and fixed to the housing 10, thereby realizing the installation of the diaphragm 23. The recessed direction of the folding ring portion 232 is the same as the recessed direction of the bracket portion 241, thereby reducing the thickness of the sound-generating device 100 along the vibration direction of the vibration system 20, thereby thinning the sound-generating device 100, and under the same thickness requirement, the vibration space of the vibration system 20 can be increased. The folding ring portion 232 can be a regular arc structure, such as a semicircular arc or an elliptical arc, and of course it can also be an irregular curve. The inner fixing portion 233 is arranged on the inner periphery of the folding ring portion 232, and is used to connect with the vibration plate 24.

[0054] Of course, the folding ring portion 232 may also include an outer folding ring portion protruding outward and an inner folding ring portion recessed inward, and the outer folding ring portion is connected to the outer periphery of the inner folding ring portion.

[0055] In one embodiment, the sound generating device 100 further includes a centering support 40, one end of which is connected to the voice coil 25, and the other end of which is fixed to the housing 10, and the centering support 40 itself also has a certain elastic deformation, so as not to affect the normal vibration of the voice coil 25. By providing the centering support 40, the voice coil 25 can be centered, and the position of the voice coil 25 in the magnetic gap can be further ensured, and the direction of its movement can only vibrate up and down along its axial direction.

[0056] Specifically, two centering support plates 40 are provided, and the two centering support plates 40 are arranged at two short-axis ends of the housing 10 .

[0057] In one embodiment, the sound-generating device 100 further includes a magnetic circuit system 30, which is provided with magnetic gaps corresponding to the plurality of voice coils 25, wherein the second end of the first voice coil 251 and the first end of the second voice coil 252 are inserted into the corresponding magnetic gaps, and along the arrangement direction of the plurality of voice coils 25, the winding length of the first voice coil 251 in the magnetic gap is the same as the winding length of the second voice coil 252 in the magnetic gap. Thus, the force on the diaphragm assembly 21 can be made more uniform, distortion can be reduced, and the sound-generating effect can be improved.

[0058] In one embodiment, the magnetic circuit system 30 includes a magnetic yoke 31 and a plurality of magnet groups disposed on one side of the magnetic yoke 31 close to the diaphragm assembly 21, each magnet group includes a first magnetic portion 32 and a second magnetic portion 33 disposed on both sides of the first magnetic portion 32, the first magnetic portion 32 and the second magnetic portion 33 are spaced apart to form a magnetic gap, and two adjacent magnet groups share one second magnetic portion 33.

[0059] Specifically, the first magnetic part 32 and the second magnetic part 33 can both be in the shape of a bar, and the length is slightly smaller than the length of the long axis of the sound-generating device 100, and the first magnetic part 32 and the second magnetic part 33 are alternately arranged along the short axis direction of the sound-generating device 100, so that a parallel or nested magnetic gap can be formed. Taking the example of two voice coils 25 arranged in parallel, the number of first magnetic parts 32 is two, the number of second magnetic parts 33 is three, and the two first magnetic parts 32 are arranged between two adjacent second magnetic parts 33, so that a parallel magnetic gap can be formed around the two first magnetic parts 32, or two nested magnetic gaps can be formed around the second magnetic part 33 located in the center and around the first magnetic part 32. Two adjacent magnet groups share one second magnetic part 33, thereby saving the number of second magnetic parts 33, saving production costs, and reducing the weight of the sound-generating device 100.

[0060] The first magnetic part 32 includes a first magnet 321 and a first magnetic conductive plate 322. One side of the first magnet 321 is connected to the magnetic conductive yoke 31, and the other side is connected to the first magnetic conductive plate 322. The corresponding second magnetic part 33 includes a second magnet 331 and a second magnetic conductive plate 332. One side of the second magnet 331 is connected to the magnetic conductive yoke 31, and the other side is connected to the second magnetic conductive plate 332.

[0061] In the magnetic circuit system 30 , the outer periphery of the magnetic yoke 31 is bent to be connected to the housing 10 , or the second magnetic conductive plate 332 is connected to the housing 10 .

[0062] The second aspect of the present invention further provides an electronic device, comprising any of the above-mentioned sound-generating devices 100. Since the sound-generating device 100 of the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0063] Here, the electronic device can be a speaker, a mobile phone, a headset, and other electronic devices, which are not limited here. Of course, the sound device 100 can also be used in a vehicle as a vehicle-mounted speaker, a consumer speaker, and the like.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound-generating device, characterized in that: The invention comprises a vibration system, wherein the vibration system comprises a diaphragm assembly and a plurality of voice coils, wherein the plurality of voice coils respectively have a first end and a second end arranged opposite to each other along the axial direction thereof; wherein, The number of winding layers of the voice coil wire at the first end of each voice coil is greater than the number of winding layers of the voice coil wire at the second end, and the multiple voice coils include the same number of first voice coils and second voice coils, the first end of the first voice coil is connected to the diaphragm assembly, and the second end of the second voice coil is connected to the diaphragm assembly.

2. The sound generating device according to claim 1, characterized in that: The plurality of voice coils are arranged side by side; or, the plurality of voice coils are arranged coaxially and nested.

3. The sound generating device according to claim 1, characterized in that: The first voice coils and the second voice coils are arranged alternately and side by side horizontally.

4. The sound generating device according to claim 1, characterized in that: Each of the voice coils comprises at least two winding regions with different numbers of voice coil wire winding layers, and a step portion is formed between two adjacent winding regions.

5. The sound generating device according to claim 1, characterized in that: The outer dimensions of the first voice coil and the second voice coil are consistent.

6. The sound-generating device according to any one of claims 1 to 5, characterized in that: The diaphragm assembly includes a diaphragm and a vibration plate arranged on the diaphragm, the diaphragm is arranged on the outer periphery of the vibration plate, a portion of the vibration plate is recessed toward the direction close to the voice coil to form a bracket portion corresponding to the multiple voice coils one by one, and each voice coil is connected to the corresponding bracket portion.

7. The sound generating device according to claim 6, characterized in that: The diaphragm includes a folding ring portion, an inner fixing portion arranged on the inner side of the folding ring portion, and an outer fixing portion arranged on the outer side of the folding ring portion, the inner fixing portion is connected to the vibration plate, and the recessed direction of the folding ring portion is the same as the recessed direction of the bracket portion.

8. The sound-generating device according to any one of claims 1 to 5, characterized in that: The sound-generating device also includes a magnetic circuit system, which is provided with magnetic gaps arranged in one-to-one correspondence with the plurality of voice coils, wherein the second end of the first voice coil and the first end of the second voice coil are inserted into the corresponding magnetic gaps, and along the arrangement direction of the plurality of voice coils, the winding length of the first voice coil located in the magnetic gap is the same as the winding length of the second voice coil located in the magnetic gap.

9. The sound generating device according to claim 8, characterized in that: The magnetic circuit system includes a magnetic yoke and a plurality of magnet groups arranged on one side of the magnetic yoke close to the diaphragm assembly, each of the magnet groups includes a first magnetic portion and a second magnetic portion arranged on both sides of the first magnetic portion, the first magnetic portion and the second magnetic portion are spaced apart to form the magnetic gap, and two adjacent magnet groups share one second magnetic portion.

10. An electronic device, characterized in that: Comprising a sound-generating device according to any one of claims 1-9.

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